<template>
  <div>
    <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>商品管理</el-breadcrumb-item>
      <el-breadcrumb-item>参数列表</el-breadcrumb-item>
    </el-breadcrumb>
    <el-card>
      <el-alert
        show-icon
        :closable="false"
        title="注意：只允许为第三级分类设置相关参数！"
        type="warning"
      ></el-alert>
      <el-row class="cat_opt">
        <el-col>
          <span>选择商品分类：</span>
          <el-cascader
            v-model="selectCateKeys"
            :options="cateList"
            :props="cascaderProps"
            @change="handleChange"
          ></el-cascader>
        </el-col>
      </el-row>
      <el-tabs v-model="activeName" @tab-click="handleClick">
        <el-tab-pane label="动态参数" name="many" :disabled="isBtnDisabled">
          <el-button
            type="primary"
            size="mini"
            @click="addDialogVisible = true"
            :disabled="isBtnDisabled"
            >添加参数</el-button
          >
          <el-table :data="manyTableData" border stripe>
            <el-table-column type="expand">
              <template v-slot="scope">
                <el-tag
                  :key="index"
                  v-for="(item, index) in scope.row.attr_vals"
                  closable
                  :disable-transitions="false"
                  @close="handleClose(index, scope.row)"
                >
                  {{ item }}
                </el-tag>
                <el-input
                  class="input-new-tag"
                  v-if="scope.row.inputVisible"
                  v-model="scope.row.inputValue"
                  ref="saveTagInput"
                  size="small"
                  @keyup.enter.native="keyup(scope.row)"
                  @blur="handleInputConfirm(scope.row)"
                >
                </el-input>
                <el-button
                  v-else
                  class="button-new-tag"
                  size="small"
                  @click="showInput(scope.row)"
                  >+ New Tag</el-button
                >
              </template>
            </el-table-column>

            <el-table-column type="index" label="#"></el-table-column
            ><el-table-column
              label="参数名称"
              prop="attr_name"
            ></el-table-column>
            <el-table-column label="操作"
              ><template v-slot="scope">
                <el-button
                  size="mini"
                  type="primary"
                  icon="el-icon-edit"
                  @click="showEditDialog(scope.row.attr_id)"
                >
                  编辑</el-button
                >
                <el-button
                  size="mini"
                  type="danger"
                  icon="el-icon-delete"
                  @click="deleteParams(scope.row.attr_id)"
                  >删除</el-button
                >
              </template></el-table-column
            >
          </el-table>
        </el-tab-pane>
        <el-tab-pane label="静态属性" name="only" :disabled="isBtnDisabled">
          <el-button
            type="primary"
            size="mini"
            @click="addDialogVisible = true"
            :disabled="isBtnDisabled"
            >添加属性</el-button
          >
          <el-table :data="onlyTableData" border stripe>
            <el-table-column type="expand">
              <template v-slot="scope">
                <el-tag
                  :key="index"
                  v-for="(item, index) in scope.row.attr_vals"
                  closable
                  :disable-transitions="false"
                  @close="handleClose(index, scope.row)"
                >
                  {{ item }}
                </el-tag>
                <el-input
                  class="input-new-tag"
                  v-if="scope.row.inputVisible"
                  v-model="scope.row.inputValue"
                  ref="saveTagInput"
                  size="small"
                  @keyup.enter.native="keyup(scope.row)"
                  @blur="handleInputConfirm(scope.row)"
                >
                </el-input>
                <el-button
                  v-else
                  class="button-new-tag"
                  size="small"
                  @click="showInput(scope.row)"
                  >+ New Tag</el-button
                >
              </template>
            </el-table-column>

            <el-table-column type="index" label="#"></el-table-column
            ><el-table-column
              label="参数名称"
              prop="attr_name"
            ></el-table-column>
            <el-table-column label="操作"
              ><template v-slot="scope">
                <el-button
                  size="mini"
                  type="primary"
                  icon="el-icon-edit"
                  @click="showEditDialog(scope.row.attr_id)"
                >
                  编辑</el-button
                >
                <el-button
                  size="mini"
                  type="danger"
                  icon="el-icon-delete"
                  @click="deleteParams(scope.row.attr_id)"
                  >删除</el-button
                >
              </template></el-table-column
            >
          </el-table>
        </el-tab-pane>
      </el-tabs>
    </el-card>
    <el-dialog
      :title="'添加' + (activeName === 'many' ? '动态参数' : '静态属性')"
      :visible.sync="addDialogVisible"
      width="50%"
      @close="addFormClose"
    >
      <el-form
        :model="addForm"
        :rules="addFormRules"
        ref="addFormRef"
        label-width="100px"
      >
        <el-form-item
          :label="activeName === 'many' ? '动态参数' : '静态属性'"
          prop="attr_name"
        >
          <el-input v-model="addForm.attr_name"></el-input>
        </el-form-item>
      </el-form>
      <span slot="footer" class="dialog-footer">
        <el-button @click="addDialogVisible = false">取 消</el-button>
        <el-button type="primary" @click="addParams">确 定</el-button>
      </span>
    </el-dialog>
    <el-dialog
      :title="'修改' + (activeName === 'many' ? '动态参数' : '静态属性')"
      :visible.sync="editDialogVisible"
      width="50%"
      @close="editFormClose"
    >
      <el-form
        :model="editForm"
        :rules="editFormRules"
        ref="editFormRef"
        label-width="100px"
      >
        <el-form-item
          :label="activeName === 'many' ? '动态参数' : '静态属性'"
          prop="attr_name"
        >
          <el-input v-model="editForm.attr_name"></el-input>
        </el-form-item>
      </el-form>
      <span slot="footer" class="dialog-footer">
        <el-button @click="editDialogVisible = false">取 消</el-button>
        <el-button type="primary" @click="editParams">确 定</el-button>
      </span>
    </el-dialog>
  </div>
</template>
<script>
export default {
  data() {
    return {
      inputVisible: false,
      inputValue: '',
      editDialogVisible: false,
      editForm: { attr_name: '' },
      editFormRules: {
        attr_name: [
          { required: true, message: '请输入参数名称', trigger: 'blur' }
        ]
      },
      addForm: { attr_name: '' },
      addFormRules: {
        attr_name: [
          { required: true, message: '请输入参数名称', trigger: 'blur' }
        ]
      },
      addDialogVisible: false,
      activeName: 'many',
      selectCateKeys: [],
      cascaderProps: {
        expandTrigger: 'hover',
        children: 'children',
        value: 'cat_id',
        label: 'cat_name'
      },
      cateList: [],
      manyTableData: [],
      onlyTableData: []
    }
  },
  created() {
    this.getCateList()
  },
  methods: {
    keyup(row) {
      this.handleInputConfirm(row)
    },
    handleInputConfirm(row) {
      if (row.inputValue.trim().length === 0) {
        row.inputValue = ''
        return (row.inputVisible = false)
      }
      row.attr_vals.push(row.inputValue.trim())
      row.inputValue = ''
      row.inputVisible = false
      this.saveAttrVals(row)
    },
    // 将对 attr_vals 的操作，保存到数据库
    async saveAttrVals(row) {
      // 需要发起请求，保存这次操作

      const { data: res } = await this.$http.put(
        `categories/${this.selectCateKeys[2]}/attributes/${row.attr_id}`,
        {
          attr_name: row.attr_name,
          attr_sel: row.attr_sel,
          attr_vals: row.attr_vals.join(' ')
        }
      )

      if (res.meta.status !== 200) {
        return this.$message.error('修改参数项失败！')
      }

      this.$message.success('修改参数项成功！')
    },
    async handleClose(tag, row) {
      row.attr_vals.splice(tag, 1)
      this.saveAttrVals(row)
    },

    showInput(row) {
      row.inputVisible = true
      this.$nextTick(_ => {
        this.$refs.saveTagInput.$refs.input.focus()
      })
    },
    deleteParams(id) {
      this.$confirm('此操作将永久删除该文件, 是否继续?', '提示', {
        confirmButtonText: '确定',
        cancelButtonText: '取消',
        type: 'warning'
      })
        .then(async () => {
          const { data: res } = await this.$http.delete(
            `categories/${this.selectCateKeys[2]}/attributes/${id}`
          )

          if (res.meta.status !== 200) {
            return this.$message.error('删除参数失败！')
          }

          this.getParamsData()
          this.$message({
            type: 'success',
            message: '删除成功!'
          })
        })
        .catch(() => {
          this.$message({
            type: 'info',
            message: '已取消删除'
          })
        })
    },
    async showEditDialog(attrId) {
      const { data: res } = await this.$http.get(
        `categories/${this.selectCateKeys[2]}/attributes/${attrId}`,
        {
          params: { attr_sel: this.activeName }
        }
      )

      if (res.meta.status !== 200) {
        return this.$message.error('获取参数信息失败！')
      }

      this.editForm = res.data
      this.editDialogVisible = true
    },
    editParams() {
      this.$refs.editFormRef.validate(async valid => {
        if (!valid) return
        const {
          data: res
        } = await this.$http.put(
          `categories/${this.selectCateKeys[2]}/attributes/${this.editForm.attr_id}`,
          { attr_name: this.editForm.attr_name, attr_sel: this.activeName }
        )

        if (res.meta.status !== 200) {
          return this.$message.error('修改参数失败！')
        }

        this.$message.success('修改参数成功！')
        this.getParamsData()
        this.editDialogVisible = false
      })
    },
    editFormClose() {
      this.$refs.editFormRef.resetFields()
    },
    addParams() {
      this.$refs.addFormRef.validate(async valid => {
        if (!valid) return
        const { data: res } = await this.$http.post(
          `categories/${this.selectCateKeys[2]}/attributes`,
          {
            attr_name: this.addForm.attr_name,
            attr_sel: this.activeName
          }
        )

        if (res.meta.status !== 201) {
          return this.$message.error('添加参数失败！')
        }
        this.$message.success('添加参数成功！')
        this.getParamsData()
        this.addDialogVisible = false
      })
    },
    addFormClose() {
      this.$refs.addFormRef.resetFields()
    },
    handleClick() {
      this.getParamsData()
    },
    handleChange() {
      this.getParamsData()
      console.log(this.selectCateKeys)
    },
    async getParamsData() {
      if (this.selectCateKeys.length !== 3) {
        this.manyTableData = []
        return (this.selectCateKeys = [])
      }
      const { data: res } = await this.$http.get(
        `categories/${this.selectCateKeys[2]}/attributes`,
        {
          params: { sel: this.activeName }
        }
      )

      if (res.meta.status !== 200) {
        return this.$message.error('获取参数列表失败！')
      }
      res.data.forEach(item => {
        item.attr_vals = item.attr_vals ? item.attr_vals.split(' ') : []
        // 控制文本框的显示与隐藏
        item.inputVisible = false
        // 文本框中输入的值
        item.inputValue = ''
      })
      if (this.activeName === 'many') {
        this.manyTableData = res.data
      } else {
        this.onlyTableData = res.data
      }
    },
    async getCateList() {
      const { data: res } = await this.$http.get('categories')
      if (res.meta.status !== 200) {
        return this.$message.error('获取商品分类失败！')
      }
      this.cateList = res.data
    }
  },
  computed: {
    isBtnDisabled() {
      if (this.selectCateKeys.length !== 3) {
        return true
      }
      return false
    }
  }
}
</script>
<style lang="less" scoped>
.cat_opt {
  margin: 15px 0;
}
.el-tag {
  margin: 10px 10px 0 0;
}
.input-new-tag {
  width: 90px;
}
</style>
